As pointed out by Vlastimil, there is a redundant check in shrink_zones
since commit "mm, vmscan: avoid passing in classzone_idx unnecessarily to
compaction_ready". The zonelist iterator only returns zones that already
meet the requirements of the allocation request.
This is a fix to the mmotm patch
mm-vmscan-avoid-passing-in-classzone_idx-unnecessarily-to-compaction_ready.patch
Signed-off-by: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx>
---
mm/vmscan.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 4fdb9e419588..c2ad4263f965 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -2606,7 +2606,6 @@ static void shrink_zones(struct zonelist *zonelist, struct scan_control *sc)
*/
if (IS_ENABLED(CONFIG_COMPACTION) &&
sc->order > PAGE_ALLOC_COSTLY_ORDER &&
- zonelist_zone_idx(z) <= sc->reclaim_idx &&
compaction_ready(zone, sc)) {
sc->compaction_ready = true;
continue;
--
2.6.4
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